先生 vs PROTOCOL
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
先生
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先生、お元気ですか。 春が来て、また僕たちは 人生の階段を上りました。 踊り場でふと、満開の桜を見て 先生の言葉を思い出したんです。 厳しい冬の寒さがあってこそ 桜は綺麗な花を咲かす。 先生、あなたは教えてくれました。 先生、あなたは冬の寒さに耐えた桜です。 先生、今、花を咲かす時が来ました。 ++++++++++++++++++++++++++++ あの”先生“がスマートフォンアプリで奇跡の大復活!! 画面をタップ!迫りくる人生の壁を切り抜けろ! ++++++++++++++++++++++++++++ 容赦ない言葉の羅列! トラウマ必須!悪夢の様に耳障りなB・G・M! 危うし!エレクトロ・サイキック・サイバー・パンク・ティーチャー! レッツ・キャッチ・ザ・フューチャー! ノーフューチャー!
PROTOCOL
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The day dimensional rifts opened, monsters and the Dimension Awakened appeared at the same time. As monsters spread across the world, the government gathered students with dimensional powers and established the Tactical Academy. Become its commander, train your students, and deploy to a city under threat. Control the leader directly and give orders to two fellow agents. Combine their abilities, weapons, and parts to lead a three-person squad. • Survive the waves of monsters. • Train distinctive students and build your squad. • Find powerful combinations, overcome each battle, and protect the city. A two-person indie game. PROTOCOL: Zero Rift
Screenshots
Verdict
The clearest difference is in-app purchases: 先生 at none against PROTOCOL's 10. 先生 also leads on ads (none vs shown) and iOS requirement (6.0 vs 15.0). PROTOCOL's advantage is update cadence (every 3 days vs every 43 months). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. PROTOCOL sells 10 one-off in-app purchases. 先生 asks for nothing beyond the download.
先生 ships an update every 43 months, PROTOCOL every 3 days. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.
| Parameter | 先生 | PROTOCOL |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 90.9% of reviews | — |
| Update frequency | Every 43 months | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 6.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 23 MB | 259 MB |
| Age rating | 9+ | 9+ |
| Developer | m7kenji | SungGwon Han |
In-app purchases
先生
No in-app purchases
PROTOCOL
- Beginner Package 1$0.99
- Sale Package 3$1.99
- Sale Package 1$2.99
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- Sale Package 2$4.99
- Beginner Package 2$4.99
- Remove Ad$5.99
- Daily Special Mission Ticket$7.99
- Mission Energy Booster (30 Days)$9.99
- Stage Pass$9.99
- Beginner Package 3$14.99









